Tension device for shuttles



J. BARTON AND W. COTTERILL.

TENSION DEVICE FOR SHUTTLES.

APPLICATION FILED JAN.2. I919.

Patented June 24, 1919.

JAMES BARTON AND WALTER COTTERILL, OF NEWARK, NEW JERSEY, ASSIGNORS TO THE ROSSENDALE-REDDAWAY BELTING'r 8a HOSE 60., INC., OF NEWARK, NEW

JERSEY, A CORPORATION OF NEW JERSEY.

Specification-of Letters Patent.

Patented June 24, 1919.

Application filed January 2, 19-19. 'Scrial No. 269,211.

To all whom it may concern:

Be it known that we, JAMEs BARTON and WALTER CO'I'IERILLI, both citizens of the in Tension Devices for Shuttles, of which the following is a full, clear, and exact description.

' The invention which constitutes the subject matter of this application relates to an improvement in tensioning devices for shuttles which are employed in connection with the art of weaving, and in particular the weaving of cotton and hair belting.

The principal type of shuttle heretofore employed in this particular art comprised two corrugated rollers between which the thread is fed, means for maintaining those rollers in contact and for varying the pressureof these rollers upon each other, and also means for guiding the thread from the spool to these corrugated rollers. The rapidity with which the thread is fed through these rollers causes the corrugations thereon to wear away at a very rapid rate not only resulting in a variation in tension that couldnot .be compensated for but necessitating frequent renewal of the coacting rollers. Furthermore the guide means employed on these prior devices caused considerable trouble in that they frequently permitted snarls or kinks of thread to pass between the rollers with a result that many of the weft threads would be loosely woven intothe fabric and therefore unequally tensioned and thereby enabling the belt to stretch unevenly. Then again the threads not infrequently would feed too fast from the spool, get entangled in the rollers, and be broken causing considerable delay in the weaving operation.

It is the object of our invention to overcome the various difficulties above men tioned; and other objects will appear from the detailed description below taken in connection with the accompanying drawings, in which- Figure 1 is a top plan view of a shuttle with our improved tensioning means applied thereto.

Fig. 2 is a central vertical longitudinal section of Fig. 1, and

Fig. 3 is a section taken on line 33 of Fig. 2 looking in the direction of the arrow.

Referring to the drawing in detail the reference numeral 10- designates the body of the shuttle, 11 the thread, and 12 the spool or bobbin upon which the thread is wound. The spool holder is pivoted at 13 and is normally held within the bobbin chamber 14 of the shuttle by means of the spring 15 which bears against the part 16 which projects re'arwardly from the pivot 13. There is also provided at the front end of the shuttle tufts of hair 17 and in the sides of the bobbin chamber a plurality of perforations or eyes 18 through one of whlch the thread finally passes in the act of weaving. This mechanism which we have just briefly described is all old and well known and we make no claims thereto except as it forms or constitutes a part of the combination in the production of the new and unitary results hereinafter 'referred to.

.The forward end of the shuttle is provided with a chamber 19 in which the tensioning means is located, and this chamber 19 is separated from the bobbin chamber 14; by means of a bridge 20 in substantially the central part of which there is provided a perforation 21 through which the thread passes from the bobbin to the tensioning means. The lower side of the shuttle is provided with a longitudinal slot 22 preferably extending at. least throughout the entire length of the respective chambers 14: and 19. And it will be seen from Figs. 2 and 3 that the lower side of the bridge 20 is provided, for instance, with a slot or cutaway portion 23 preferably equal to the width of slot 22 so as to provide a path or guide within the shuttle body for the thread after it leaves the tensioning means.

The tensioning means proper, as stated above, is located within the chamber 19 and comprises a rotatable cylindrical member 24: having a smooth surface and transversely journaled in the sides of the said chamber. Pivoted about a transverse axis 25 is a lever 26 which is provided with a clamping member 27 which engages with the sur'ace of the cylindrical member the engaging surface of said clamping member being shaped to correspond with the surface of the cylinder, that-is, it is arcuate in cross section. The free end of the lever is normally located adjacent to the perforation 21 in the bridge 20 and is provided with an eye 28 teoaaaa in said end which is located substantially opposite to said perforation 21, and through which the thread 11 passes from the perforation 21 and by which the thread is guided between the clamping member 27 and the roller member 24. Preferably engaging the upper surface of the lever 26 isan independently secured spring 29, the tightening ing depression in the end of the shuttle and is thereby held against lateral movement about the screw 30 as a center with theresult that'the forward end is always in con- I tact with the upper surface of the lever 26.

Mounted adjacent to the cylindrical roller member 24 is a rod 33 over which the thread passes after it leaves the roller 24 and the lower edge of which is substantially in a horizontal plane with the upper edge of the cutaway portion 23 in the bridge 20. This enables the filling thread to pass from the roller to the lateral eyesa18 without wearing grooves on the lower side of the bridge as it would otherwisedo.

From the foregoing it will be seen that we have not only devised a construction which possesses simplicity of construction, durability, compactness, and certainty of action but also possessing certain advantages in operation over shuttles heretofore in vogue, chief of which is the following: Any tendency for the formation of kinks or snarls in the filling thread due to its rapid feed from the bobbin is effectively overcome by the provision of the bridge 20 and the perforation 21 therein; the perforation 21 also prevents any loops or kinks in the thread from being thrown around the ends of the member 27 of the lever 26; the provision of a roller member with a smooth surface between which and the member 27 the thread passes not only reduces the Wear to a minimum but also enables the tension to be uniform at all times; the provision of the'eye 28 in the lever 26' prevents the thread from passingfrom under the member 28 and removes any kinks or snarls that may pass through perforation 21'; the provision of the cut-away 23 in the bridge enables the thread to feed from the tension means within chamber 19 backwardly within the confines of the shuttle to the eyes 18 located in the side of the bobbin chamber 14; and the means for securing and tensioning of the spring 29 being attached independently of the lever 26 to the toe of the shuttle enables the parts to be removed and renewed with the minimum amount of time and labor.

It is to be expressly understood that we do not limit ourselves to the exact construction described herein and illustrated in the said member and roller.

accompanying drawing as many changes may be made in point of detail and other embodiments resorted to without deviating from the true spirit and scope of our invention.

What we claim is:

1. The combination with a shuttle provided with two chambers, one of said chambers provided with' one or more lateral perforations or eyes in one side thereof, of a bobbin in said last mentioned chamber, a tensioning means located in the other chamher, and a bridge separating said chambers and provided with a perforation therein through which the thread is adapted to be fed from the bobbin to the tension means and also provided with a cut-away portion through which the thread is fed back from the tension means throu h the bobbin chamber to the eyes in the si es of the'latter.

2. A-shuttle provided with a bobbin chamber therein and an eye in the side thereof, a bobbin located in said chamber in combination with a tensioning device for the thread passing from said bobbin out through the eyeof the shuttle comprising a smooth cylindrical roller rotatably journaled in the sides of the shuttle, a lever secured at one end to and oscillatable'about an axis parallel to the axis of. theroller, the other end of said lever being provided with a thread clamping member engaging with said roller and also provided with an eye by which the thread isguided between said member and roller, and an independently secured spring adapted to. vary the clamping action between the said member and roller.

3. A shuttle provided with a bobbin chamber therein and an eye in the side thereof, a bobbin located in said chamber in combination with a tensionin device for the thread passing for said bobbin out through the eye of the shuttle, comprising .a cylindrical roller rotatably journaled in the sides of the shuttle, an independently pivoted spring tensioned lever provided with a thread clamping member engaging with said roller and also provided with an eye by which the thread from the bobbin is guided between 4. A shuttle provided with two chambers,

one of which is provided with one or more lateral perforations or eyes in one side thereof, of a bobbin in said last mentioned chamber in combination with means located in the other chamber for tensioning the thread passing from said bobbin out through one of the eyes in the side of the bobbin chamber comprising a cylindrical roller rotatably journaled in the sides of said chamber and. over which the thread is adapted to pass from the bobbin and back to one of the eyes in the side of the bobbin chamber and an independently pivoted spring tensioned lever provided with a morass thread clamping me ber engaging withsaid roller, and said lever also provided with an eye by which the thread from the bobbin is guided between said member and roller. 5. A shuttle provided with two chambers, one of which is provided with one or more lateral perforations or eyes in one side thereof, of a bobbin in said last mentioned chamber in combination with means located in the other chamber for tensioning the thread passing from said bobbin out through one of the eyes "in the side of the bobbin chamber comprising a cylindrical roller ro- 1 tatably journaled in the sides of said chamber and over which the thread is adapted to pass from the bobbin and back to one of the eyes in the side of the bobbin chamber, an independently pivoted spring tensioned lever provided with a thread clamping member engaging with said roller, said lever also rovided with an eye by which the thread rom the bobbin is guided between said member and roller, and means between said chamber for guiding the thread as it passes from the bobbin to the eye of the tensioning lever and for guiding the thread as it passes from the tensioning means to one of the eyes in the side of the bobbin chamber.

6. A tensioning means for shuttles, comprising a cylindrical roller rotatably journaled in the shuttle, in combination with a spring tensioned lever provided with a thread clamping member engaging with said roller and also provided with an eye by which the thread is guided between said member and roller.

7. A tensioning means for shuttles, comprising a cylindrical roller rotatablyjournaled in the shuttle, in combination with a ivoted lever provided with a thread clamping member engaging with said roller and also provided with an eye by which the thread is guided between said member and roller, and means for varying the clamping action of said member and roller.

8 A tensioning means for shuttles, comprising a Cylindrical roller member rotatably mined tension in contact with. the fixed member.

9. A. shuttle provided with two chambers,

one of which is provided with one or more lateral perforatlons or eyes .in one side thereof, of a bobbin in said last mentioned chamber, and a bridge or other substantially solid partition separating said chambers and provided with perforations therein for guiding the thread as it passes from the bobbin to the tension means and as it passes back from the tension means through the bobbin chamber and through the perforations and eyes in the side of the latter, said tension means comprising a cylindrical roller transversely journaled with respect to said shuttle, a lever provided with a thread clamping member thereon shaped to correspond with the surface of said roller with which it is adapted to engage and also provided with a perforation or eye by which the thread from one of the perforations in the -bridge is guided between said member and JAMES BARTON. WALTER GOTTERILL. 

